Safety-brake for automobiles.



G. w.-KYANNEY & E. F. OYSTER.

SAFETY BRAKE FOR AUTOMOBILES. APPLICATIONTJLED OCT- 18 1912 l 144,877. Y Patented JuneA 29, 1915.

2 SHEETS-SHEET I.

TTUR/VEYS G. W. YANNEY & E. FI OYSTER.

SAFETY BRAKE FOR AUTOMOBILES. .APPL'ICATION FILED ocT.18.1`912.

Patented June 29, 1915.

2 SHEETS-SHEET 2.

WITNESS ATTORNEYS Yratchet teeth' 24 4vp'lyfturn the said sleeve with the shaft and the pinion 12. 'Upon'a-reverse movement of the. shaft 11 the cam-'surfaces 17 of .the hub 16 will iengagethe' vends ofthe adjacent teeth 20 and move the sleeve-14 axially a .sufficient distance vto cause ratchet teeth 23 onthe opo'site-end of said sleeveto engage mating on the opposedface of the Similarly 'the teeth 18 on-.the hub stop 15.

19 on the 16 will engage the. cam surfaces -sleeve- 14 between the teeth' 2O thereof, so

ytegral with a bracket 2 6 any suitable manner 'on sleeve'and stop 15.' solang as the pinion 'ing the .reverse pinion 13 out of transmission .gagement with the pinion 12- when 1t 1sagain =pinion 13. to

thatthe adjacent teeth on the sleeve and hub respectively co-act with corresponding opposed cam surfaces for the shifting of the sleeve axially to move it/into locked engagement'withthe stop 15.

Inthe 'example shown-the stopv 15 is-inwhich is secured vin 'the gearcase 1Q. When,- again, .the shaft,1'1 is turned for- Wardly,

place; -since the sleeve 14 which engagement is maintained .while the sleeve is `in locked. engagement w1t h thestop 15, andthe lfoi-Ward turning ofA the-sleeve 14 will now cause arev'erse axial movement of the sleeve','by reason ofthe contact of the-inclined opposedsurfaces 27-28 on the 12 is turned forwardly 'bythe slidable transmission pinionl 13 the transmission gear `may rotate "inthe ordinary manner, rbut-Eupen thebackward movemissionpinion 13V against movement. .When

itifis desired to reverse the vehiclehy throwpinion 13 is'mov-ed bya sliding gear rod 29, as' usual, 'and this'` will slide the transmission engagement with the brake pinion12, the' shifting'of'the pin ion..13 be v ing accomplished in the usual manner, a shiftingforkBO onthe rod 29.

XVe provide a means to insure' that the pinion. 13 will slide 'into endesired to r'un the machine forwardly', the desirabilityT of such a 'device being -occasioned jby the fact that the pinion 12I Jvill .be stationary when thej sliding transmission be thrown into mesh there.- with, and the teeth ofthe said pinions might come opposite each other; For' thespecified purpose the shiftingrod v29 is provided the' reverse movement of the-sleeve' to that just -described will' .obviously take in a easing 3 9 lwill be turned by the engagement of the teeth 18` and 20,

' ment of thepinion 13, still in mesh with the` pinion 1 2, the sleeve 14 will lock'the pinion gear into. action, the sliding as by with a brush 31hav1ngvire bristles 32, and

` the hub 16 'of the pinion 12vis formed with an annular seriesfofribs 33, so that when the rod 29 is -'shifted to' throw the pinions 13 and 12 into mesh, the .brush o n said rod will'cross." the spiral ribs 33 and cause a partial turning ofv the pinion 12 and shaft 1 1, andl thus facilitate the engagement of the pinions 12 vand 13.

I n connection with the sleeve 1.4 we may' provide a retarding means to prevent a too free rotation of -thesleeve 14 With the hub 16, and cause it to move axially with .a backward movement vofthe shaft 11. "Thus,-as best shown in -Figf 3, friction blocks 34 are slidably mounted -in a' portion 10a ofthe gear case, and bear, by their concave inner ends, 'against theperimeter of the sleeve, the

blocks being pressed toward saidsleeve by I spiral springs35 housed in the gear case.

In the Aform shown. in Fig. 4, our invention is applied t0 the shaft 36 leading to the diferential'from the transmisison gear 37.

, this donstru'ction the shaft 3 6 has secured thereto a member 38 constituting a rotary clutch.me1nber, which desirably is housed which may be sustained by a depending member- 40`from'the chassis 41./

, A. stop isf provided inv this form .of the invention consisting ofa sliding pin 42 which :hasa cord. or equivalent 'fieXible connection 43 with the-usual reverse 'lever (notshown),

`so 'that upon throwing the clutch lever the pin- 42 will' be moved axially'to inoperative position against the tension of an expansionv It will thusbe seen that' v.spring 44.

etween the rotary clutch .mem- -ber 38' andthe stop pin 42 an intermediate clutchmember is provided, consisting ofa sleeve 1451,15which, like the sleeve. 14fpreviously "described, has

axial movementrelative tothe clutch member. 38 sufficient to engage said s leev-e .14*x

' To shift `the sleeve 14a toward the stop they member 38 is -formed with camsurfaces 45 and the sleeve 14afwith-mating`cam surfaces 46, there being longitudinally dis- 'posed shoulders 47-48 formed respectively The pin "42at the' inner end is beveled and. provided on the said. members 38 and 14a'.

with acam surface '49,and-the adj acent-end Y of the "sleeve 14"" is formed with recesses to inedbystopashoulder's 50 at one side and a limited rotary and' i T. receive thestop pin,- the recesses being decarng`surfacesf^- 51 v atjthegoth'er. Thus, the

urfaces 5 1, upon' the forward move- V-sha'ft 36, willif the sleeve 14a engagementby reason of with the beveled' cam surface 49 of the stop.' 7 i pin; while, on the other hand,any 'back- .ward movement of the Ashaft 36 will, by reason of theop'posed cam' surfaces 15-46, shift, the sleeve 14EL axially and engage the sleeve with the stop pin, thus locking the 125 'car isto vbe reversed,and the reparts against further 'backward'movement. When the 100 witlrthe' stop pin and disengage it there- -from.

verse lever'is thrown, thestop pin will be withdrawn by the cord 43 out of the path of the sleeve 14?1 and will permit the shaft 36 to reverse in the same manner as described form of which is similar to the member 38- in F ig. 4. Similarly the shaft 52 mounts a sleeve 14b similar to the sleeve 14, and a stop pin 42ZL is provided to be operated fromthe reverse lever by a cord 43a. The

said stop pin is beveledto provide a cam surface 49a', and the sleeve 14b is formed with walls 50a-451% .Thus, it will be obvious that the shaft 52 is free to rotate forwardly, but upon a backward movement thereof itwill be arrested by the axial movement of the sleeve 14b into locking engagement with the stop pin in the same manner as described-with reference to vtion shown in Fig. 4.

Having thus described our invention, what we claim 'as new and desire to secure by Letters Patent is 1. A brake device for arresting retrograde movement comprising a driving member, a rotatable clutch member connected with said driving member and independently supported therefrom, an independent-supported non-rotating stop, and an intermediate clutch member movable axially on the first mentioned element into yengagement either with the rotary clutch member or with the said stop, the opposed ends of the rotary and intermediate clutch members having co acting means to cause the axial movement of the intermediate member into engagement with the stop when theshaft or other rotary element turns backward, and the intermediate member having means at its opposite end coact. ing with the stop to shift the said intermediate member out of engagement with the stop upon a forward movement from the arrested position.

2. A device for arresting backward movementcomprising a driving-member,a rotatable clutch member supported independently thereof and connected therewith, a member xed on said rotatable member and rotating therewith, a stop rigid as to the rotatable element, an intermediate clutch member revoluble by and with the member on the rotary element and movable axially relatively tothe said member without total disengagement therefrom, there being means on the said intermediate clutch member to engagewith the member on the rotary element, when the latter turns backwardly, for

theconstrucj *engagingthe intermediate member with the stop, and means on-'the said intermediate member to engage and co-act with the stop to reverse theA said axial movement when the rotary element moves forward.

3..Al safety brake device, comprising a'v clutch member, a clutch stop, and an intermediate clutch member having axial movement relative to said rst mentioned clutch member tomake connection with said stop, a driving member and a movable-member 'connecting the brake device andY the driving member during the forward rotation of said driving member and when said member is neutral, and disconnecting said brake devicev and the driving member during the reverse rotation ofv said driving member.

4. A brake device for arresting backward movement of a rotary element, comprising a clutchI member rotating with said element, a l

stop, an intermediate clutch member having axial movement relatively tothe first men tioned rotary clutchvmember, and, a. frietional retarding device to retard rotary movement of the intermediate clutch mem-.

ber. .l 5. A brake device comprising a rotatable element, an independently supported driving member connected therewith, a cam member rigid on Jsaid rotatable element, a rigid independently supported stop provided with cam faces in alinement withsaid cam member and supporting said rotatable element, an 'intermediate member provided with cam surfaces'on either end conforming to the cam surfaces of the rotatable member and the cam stop forming clutch element and connected at all times with the rotatable member and alternately with the cam stop member and means for ktransmitting the reverse movement of the driving shaft thereto to Aoperate the same.

6. In a device of the class describedaV rotary element, a clutch member located thereon, a laterally movable clutch member coacting therewith, a stop coacting withthe laterally movable clutchh'member to lock the rotary element against retrograde movement said laterally movable-element andv impart return movement thereto upon a forward movement of said rotary element.

and to automatically cause the release of 7. Ina device of the class described, a

and interdental spaces, a stop provided with releasing cam surfaces, a movable element operating on said rotatable'member and provided with clutch teeth Iand interdental 8, In a device of the class described, a ro- -rotary element provided with clutch teeth A tary element `provided -with clutchv teeth and stop "provided with reinterdentalspaces, a

f leasing cam surfaces, a clutch element havv "lng a rotary a-Xial movement relative to the.

rotary element e and provided with Y clutch teeth `and interdental .spaces complementar i to those of the rotary element and with loc surfaces andl releasing ,cam

surfaces adapted to automatically lock or release element.

clutchelementfa rotated clutch element vvided .,Withf means means on said element and said stop the. rotary a stop pro- Inv testimony NEY, have signed my nezsses'.' y

'GEORGE WYANNEY. ,Witnesses-:Hf

C. KOEHLER';

' 1n testimony vvhereof- I, llr'mn4` FRAKLIIN,

OYs'lnR, have signed my name to this specivvhereof'l, GEORG W. YAN- name to this specica-` tontn the presence of two subscribing wvt cation in thepresenoe ,of two subscribing"v 

